Crossword puzzle clue "loneliness"

"Loneliness is such ___" (Jimi Hendrix)

1957 Everly Brothers hit with the repeated lyric "Hello loneliness"

Loneliness parents feel when their children leave home

Loneliness syndrome when kids leave home

He wrote "In utter loneliness a writer tries to explain the inexplicable"

"___ is full of misery, loneliness, and suffering - and it's all over much too soon" (Woody Allen)

Empty-___ syndrome (feeling of loneliness when the kids move out)

Sharp feeling, as of hunger or loneliness